Perhaps you should try some spelling variations:
"dung java java snippets" » "dung va java snippets", "dung java java slippers"
"dung cu hinh snippets" » "dung cua hinh snippets", "dung co hinh snippets", "dung cho hinh snippets", "dung cu linh snippets", "dung su hinh snippets", "dung cu vinh snippets", "dung cu hinh slippers"
"locating bug code snippets" » "locating bug code slippers", "locating bung code snippets", "locating bugs code snippets", "locating bug core snippets"

Try widening your search to All Fields.

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• Performing a fuzzy search may retrieve terms with similar spellings: (((("dung cu hinh snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))~.
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• Adding a wildcard symbol may retrieve word variants: (((("dung cu hinh snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.